title: Effects of radioactive caesium on bull testes after the Fukushima nuclear plant accident.
abstract: We aimed to investigate the effect of chronic radiation exposure associated with the Fukushima Daiichi Nuclear Plant accident on the testis from 2 bulls. Estimated dose of internal exposure in one bull was 0.7-1.2 mGy (¹³⁴Cs) and 0.4-0.6 mGy (¹³⁷Cs) and external exposure was 2.0 mGy (¹³⁴Cs) and 0.8 mGy (¹³⁷Cs) (196 days). Internal dose in the other was 3.2-6.1 mGy (¹³⁴Cs) and 1.8-3.4 mGy (¹³⁷Cs) and external dose was 1.3 mGy (¹³⁴Cs) and 0.6 mGy (¹³⁷Cs) (315 days). Sperm morphology and spermatogenesis were within normal ranges. ¹³⁴,¹³⁷Cs radioactivity was detected but Cs was not detectable in the testis by electron probe microanalysis. Thus, adverse radiation-induced effects were not observed in bull testes following chronic exposure to the above levels of radiation for up to 10 months. Since we could analyse a limited number of testes, further investigation on the effects of ionizing radiation on spermatogenesis should be extended to more animals.
authors.affiliation: Faculty of Agriculture, Niigata University, Niigata, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Yamashiro
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Abe
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Fukuda
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Kino
authors.forename: Isao
authors.initials: I
authors.lastname: Kawaguchi
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Kuwahara
authors.forename: Motoi
authors.initials: M
authors.lastname: Fukumoto
authors.forename: Shintaro
authors.initials: S
authors.lastname: Takahashi
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Suzuki
authors.forename: Jin
authors.initials: J
authors.lastname: Kobayashi
authors.forename: Emi
authors.initials: E
authors.lastname: Uematsu
authors.forename: Bin
authors.initials: B
authors.lastname: Tong
authors.forename: Takahisa
authors.initials: T
authors.lastname: Yamada
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yoshida
authors.forename: Eimei
authors.initials: E
authors.lastname: Sato
authors.forename: Hisashi
authors.initials: H
authors.lastname: Shinoda
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Sekine
authors.forename: Emiko
authors.initials: E
authors.lastname: Isogai
authors.forename: Manabu
authors.initials: M
authors.lastname: Fukumoto
mesh_terms: D000818:Animals; D002417:Cattle; D002588:Cesium Radioisotopes / Q000009:adverse effects* / Q000097:blood / Q000378:metabolism*; D062406:Fukushima Nuclear Accident; D008297:Male; D011829:Radiation Dosage; D011834:Radiation Monitoring; D013091:Spermatogenesis / Q000528:radiation effects; D013094:Spermatozoa / Q000378:metabolism / Q000473:pathology / Q000528:radiation effects; D013737:Testis / Q000378:metabolism* / Q000473:pathology / Q000528:radiation effects*; D014018:Tissue Distribution
chemical_list: D002588:Cesium Radioisotopes